The config file path is passed via the --config-file option and the following configs are supported. There are no required configs
to try the tool although confluent.rebalancer.license is required after 30 days.

confluent.rebalancer.license

Confluent will issue a license key to each subscriber. The license key will be a short snippet of text that you can copy and paste. Without the license key, you can use the
Confluent Rebalancer for a 30-day trial period. If you are a subscriber and don’t have a license key, please contact Confluent Support at support@confluent.io.

Type: string

Valid Values: Confluent Platform license

Importance: high

confluent.rebalancer.metrics.topic

The topic where the metrics reporter publishes its metrics to

Type: string

Default: “_confluent-metrics”

Importance: low

The consumer used to retrieve metrics data can be configured by prefixing the consumer config name with confluent.rebalancer.metrics.. For example, to
configure the consumer to use SSL, one would set confluent.rebalancer.metrics.security.protocol=SSL.

These configs should be added to the server.properties of each broker that is part of the Kafka cluster to be rebalanced. Only the first two configs below
are required although confluent.metrics.reporter.topic.replicas should be changed if there are less than 3 brokers in the Kafka metrics cluster. The
other configs allow one to tune the publisher for additional performance and reliability.

confluent.metrics.reporter.bootstrap.servers

Bootstrap servers for the Kafka cluster where metrics will be published to.

Type: string

Importance: high

confluent.metrics.reporter.zookeeper.connect

The Zookeeper URL for the Kafka cluster used for publishing metrics. The metrics cluster may be different from the cluster(s) whose metrics are being collected. Several production Kafka clusters can publish to a single metrics cluster, for example.

Type: string

Importance: high

confluent.metrics.reporter.publish.ms

The metrics reporter will publish new metrics to the metrics topic in intervals defined by this setting. This means that the rebalancer may compute a plan based on partition
sizes that are stale by this duration. The default of 15 seconds is a reasonable value for production environments and it typically does not need to be changed.

Type: long

Default: 15000

Importance: medium

confluent.metrics.reporter.topic

Topic on which metrics data will be written.

Type: string

Default: “_confluent-metrics”

Importance: medium

confluent.metrics.reporter.topic.partitions

Number of partitions in the metric topic.

Type: int

Default: 10

Importance: medium

confluent.metrics.reporter.topic.replicas

Number of replicas in the metric topic. It should not be higher than the number of brokers in the Kafka cluster.